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Finding the Fourth Proportional to 30,963, 42,728.94 and 16,815.96

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Solution

The fourth proportional to 30,963, 42,728.94 and 16,815.96 is: 23,206.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,963 : 42,728.94 = 16,815.96 : x
  2. Step 2: Convert to fraction form
    30,963/42,728.94 = 16,815.96/x
  3. Step 3: Cross multiply
    30,963x = 42,728.94 × 16,815.96
  4. Step 4: Simplify right side
    30,963x = 718,528,145.88
  5. Step 5: Solve for x
    x = 718,528,145.88/30,963
  6. Step 6: Final answer
    x = 23,206.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.